:root{
  --purple:#9C7BC9;
  --purple-deep:#7A5BA6;
  --purple-soft:#EFE7F8;
  --bg:#F7F4FB;
  --card:#FFFFFF;
  --text:#3A2E4D;
  --muted:#8A7FA0;
  --shadow:0 6px 18px rgba(124,91,166,.15);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);
  display:flex;flex-direction:column;min-height:100vh;
  padding-bottom:calc(96px + env(safe-area-inset-bottom));
}
/* top bar */
.topbar{
  display:flex;align-items:center;justify-content:space-between;
  gap:12px;padding:12px 16px;background:linear-gradient(120deg,var(--purple),var(--purple-deep));
  color:#fff;flex-wrap:wrap;
}
.brand{display:flex;align-items:center;gap:10px}
.logo{font-size:26px}
.title{font-weight:700;font-size:17px}
.subtitle{font-size:12px;opacity:.85}
.modes{display:flex;gap:8px;flex-wrap:wrap}
.chip{
  border:none;border-radius:999px;padding:7px 12px;font-size:13px;cursor:pointer;
  background:rgba(255,255,255,.2);color:#fff;transition:.2s;
}
.chip.active{background:#fff;color:var(--purple-deep);font-weight:600}
/* layout */
.layout{flex:1;display:flex;gap:14px;padding:16px;max-width:1100px;width:100%;margin:0 auto}
.units{display:flex;flex-direction:column;gap:8px;width:170px;flex-shrink:0}
.units-head{display:flex;align-items:center;justify-content:space-between;padding:2px 4px 4px;font-size:12px;color:var(--muted)}
.units-head .mini{border:1px solid var(--purple-soft);background:var(--card);color:var(--purple-deep);
  border-radius:8px;padding:3px 10px;font-size:12px;cursor:pointer;transition:.15s}
.units-head .mini:hover{background:var(--purple-soft)}
.unit-btn{
  position:relative;text-align:left;border:2px solid var(--purple-soft);background:var(--card);
  border-radius:14px;padding:10px 30px 10px 12px;cursor:pointer;transition:.15s;color:var(--text);
}
.unit-check{
  position:absolute;top:6px;right:6px;width:20px;height:20px;border-radius:50%;
  border:2px solid var(--purple);display:flex;align-items:center;justify-content:center;
  font-size:11px;color:var(--purple);background:#fff;cursor:pointer;line-height:1;transition:.15s;
}
.unit-check.on{background:var(--purple);color:#fff;border-color:var(--purple)}
.unit-btn.selected{border-color:var(--purple)}
.unit-btn:hover{border-color:var(--purple)}
.unit-btn.active{border-color:var(--purple-deep);background:var(--purple-soft);font-weight:600}
.unit-btn small{display:block;color:var(--muted);font-size:11px;margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.content{flex:1;min-width:0}
.hint{color:var(--muted);padding:24px 6px;text-align:center;font-size:14px}
.sec-title{font-weight:700;color:var(--purple-deep);margin:14px 4px 8px;font-size:15px}
.track{
  display:flex;align-items:center;gap:12px;background:var(--card);border-radius:14px;
  padding:12px 14px;margin-bottom:10px;box-shadow:var(--shadow);cursor:pointer;transition:.15s;
}
.track:hover{transform:translateY(-1px)}
.track.playing{border:2px solid var(--purple)}
.track .ico{width:38px;height:38px;border-radius:50%;background:var(--purple-soft);
  display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}
.track .t-name{flex:1;font-size:15px}
.track .t-dur{color:var(--muted);font-size:12px}
/* player */
.player{
  position:fixed;left:0;right:0;bottom:0;background:var(--card);
  border-top:2px solid var(--purple-soft);
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  display:grid;grid-template-columns:1fr auto 1fr auto;align-items:center;gap:14px;
  box-shadow:0 -6px 18px rgba(124,91,166,.12);
}
.now{display:flex;align-items:center;gap:10px;min-width:0}
.cover{width:42px;height:42px;border-radius:12px;background:var(--purple-soft);
  display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.meta{min-width:0}
.now-title{font-weight:600;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.now-sub{font-size:11px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.controls{display:flex;align-items:center;gap:14px}
.ctrl{width:44px;height:44px;border-radius:50%;border:none;background:var(--purple-soft);
  color:var(--purple-deep);font-size:18px;cursor:pointer;transition:.15s}
.ctrl:hover{background:var(--purple);color:#fff}
.ctrl.play{width:54px;height:54px;background:var(--purple);color:#fff;font-size:22px}
.progress-wrap{grid-column:3;display:flex;align-items:center;gap:8px}
.time{font-size:11px;color:var(--muted);min-width:34px;text-align:center}
#seek{flex:1;accent-color:var(--purple-deep);height:4px}
.speed{grid-column:4;display:flex;align-items:center;gap:4px;font-size:12px;color:var(--muted)}
.spd{border:1px solid var(--purple-soft);background:var(--card);border-radius:8px;
  padding:4px 7px;cursor:pointer;font-size:12px;color:var(--text)}
.spd.active{background:var(--purple);color:#fff;border-color:var(--purple)}
@media(max-width:720px){
  .layout{flex-direction:column;padding:12px}
  .units{flex-direction:row;width:100%;overflow-x:auto;padding-bottom:4px}
  .unit-btn{min-width:130px}
  .unit-btn small{white-space:normal}
  .player{grid-template-columns:1fr auto;row-gap:8px}
  .progress-wrap{grid-column:1 / -1;order:3}
  .speed{grid-column:1 / -1;order:4;justify-content:center}
}